1/15 net 30 date of invoice translates as: A) A 1% cash discount may be taken if paid in 15 days; if no cash discount is taken, the balance is due 30 days after the invoice date. B) A 1% cash discount may be taken if paid in 15 days; if no cash discount is taken, the balance is due 30 days after the end of the month. C) A 1% discount may be taken on 15% of the purchase if the account is paid within 30 days after the end of the month. D) A 1% cash discount may be taken if paid in 15 days; if no cash discount is taken, the balance is due in 30 days after the middle of the month